Vibratory motion producing apparatus



July 8, 1941. w MATEER 2,248,182

VIBRATORY MOTION PRODUCING APPARATUS Filed March 27, 1940 2 Shets-Sheet 2 zjf? Inventor Edward M03061 4/ By 2mm A tiorn'y the beveled gear and lower portions of Patented July 8, 1941 UNITED STATES PATENT OFFICE vmrm'romr MOTION rnonucnvo APPARATUS Edward w. Maw, westnem, N. Y. Application March 27, 1940, Serial No. 326,288-

2 Claims.

This invention appertains to new and useful improvements in vibratory motion producing apparatus such as are conventionally used for vibrating screens and for other active uses., Devices of this general character have been proposed in which a pair of shafts are mounted in suitable bearings, each shaft carrying an unbalanced weight and the two shafts caused to rotate in opposite directions by intermeshed gears on their respective shafts.

The object of this invention is to provide an improved device of this class in which. the centers of the unbalanced weights are brought to a common center on the same axis and .the centrifugal force is generated bythe unbalanced weights brought into the same force plane.

Other objects and advantages of the invention reside in the simplicity of construction, the facilities for ready adjustment, the promotion of higher speed, and the fact that two or more of these units can be connected by shaft extensions.

These and various other important objectsand advantages of the invention will become apparcut to the reader of the following specification.

In the drawings- Figure 1 is a longitudinal sectional view.

Figure 2 is a transverse section on the line 2-2 of Figure 1.

Figure 3 is a side elevational view showing two units connected.

Figure 4 is a diagrammatic view showing the different positions of the weights, the same being shown in section.

Figure 5 is a cross section through the reversing gears.

Referring to the drawings wherein the numerals designate like parts, it can be seen that the device includes the housing 5 at one side of which is the cap 6 on the removable side plate 1. This cap closes the mg 8 in the side plate I in which the ball bearing assembly 9 is located and into which is disposed the tubular bearing ID of the external weight member II. The external weight member I low construction has the tubular bearing extension I2 which extends through the end wall l3 of the housing and into the annulus M where 15 is secured thereto. This tubular extension I2 is disposed through the bearing assembly "5 which is mounted within the opening 11 in the end wall i3.

Pintles 18 extending inwardly from the upper the annulus I4 carry the beveled pinions l9 which mesh with the beveled I which is of segmental and hol.

gear I! and also with the beveled gear 20 which is mounted on the elongated shaft 2| adjacent its end which is disposed into the bearing assembly f: mounted in an end cap 2t for the annulus Set screws 24 are employed for holding the pinties 18 against displacement, and tie bolts 25 are disposed through the edge portion of the cap 23 and through the annulus H to hold the same to the end wall ii of the housing 5.

As shown in Figure 1, the shaft 2! extends through the tubular extensions l0 and 12 of the external weight ll, clear of the same while secured to the shaft 2|, within the confines of the weight II is the internal and preferably solid weight 25.

The drive shaft 2| is equipped with a drive pulley 26 and extends through the packing gland 21 in the cap 8. Suitable supporting structure attaching formations 28 are provided at the bottom portion of the housing 5.

The operation of this device is as follows: The drive shaft 2| is rotated by external power applied to the pulley 26 which crosses the shaft with the internal weight 28 and the beveled gear 20 to rotate at a predetermined R. P. M. The differential arrangement of gears serve to reverse this rotation on .the other weight H causing the outer weight to rotate at the same R. P. M. as the inner balance weight, but in the opposite direction. The weights are so set up that the inner weight and outer weight are one within the other and the center of gravity of each weight within the same plane. The gears are then keyed to fix this relationship, so as to take the position as illustrated in Figure 4. These positions follow in succession. acting in one direction, acting together in one direction in the first showing, separating and neutralizing at the second illustratiomthen acting together again in the opposite direction at the third illustration and then acting neutrally again in the fourth illustration. thus setting up in the unit or object to which it is attached a reciprocating vibratory action.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the invention, what is claimed as new is:

shaft extending through the hollow shaft, weights on the shafts, a, drive at one end of the secondmentioned shaft, diflerential gearing betweenthe shafts at the ends thereof opposite from the drive, said difierential gearing being adapted to rotate said weights in opposite directions and at the same angular speed and to extend in the weight on the second-mentioned shaft operative therein.

2. A vibration producing apparatus comprising 13 a housing, a. hollow shaft in the housing, a shaft extending through the hollow shaft, weights on the shafts, a drive at one end of the second-mentioned shaft, diiferential gearing between the shafts at the ends thereof opposite from the drive, said difle'rential gearing being adapted to rotate said weights in opposite directionsand at the same angular speed and to extend in the same direction at two diametrically opposed points in the line oi vibrating movement and in opposite directions in a line perpendicular to said line of movement, said weights being of hollow construction and the other weight being mount'edto operate therethrough.

EDWARD W. MA'I'EER. 

